Using high frequency impedance standards which are fitted with precision coaxial connectors, and limiting calibrations to specific frequencies and impedance values, can contribute greatly toward improving measurement agreement and standardization.These ad Topic: Capacitors--Standards.
A tutorial discussion of the physical basis of atomic frequency standards is given.These principles are then related to the conditions under which an atom can be used as the working substance of a stable and accurate frequency standard.The three primary e Topic: Atomic frequency standards.
byKessler, Karl G.; Passaglia, Elio; Winogradoff, Nicholas N.
A brief report is presented on research in the areas of laser standards and laser materials now in progress at the National Bureau of Standards.Included are the measurement of the power and energy output of lasers, their near and far field patterns and t Topics: Lasers--Standards--Research--United States., Laser materials--Research--United States.
The Pilot Program for mass measurement is the result of a consideration in which the values produced are thought of as the products of a mass measurement process.The collective performance of elements of the mass measurement process results in establishin Topics: Standards of mass., Physical measurements., Uncertainty (Information theory)